/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.raft.storage.segstore;

import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;

class ByteChannelUtils {
    static ByteBuffer readFully(ReadableByteChannel byteChannel, int len) throws IOException {
        ByteBuffer buffer = ByteBuffer.allocate(len);

        while (buffer.hasRemaining()) {
            int bytesRead = byteChannel.read(buffer);

            if (bytesRead == -1) {
                throw new EOFException("EOF reached while reading byte channel");
            }
        }

        return buffer.rewind();
    }
}
